It didn't take very long for the preterist to hijack this thread. My two-cents worth: There is no pre-trib rapture. Christ will come back and take over this worlds kingdoms. Nobody has gone to heaven, nobody will go to heaven. Heaven (the Kingdom of) will come here.
1 Thes. 4:13-17: "But I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope. For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him. For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep. For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord."
Revelation 12 begins with:
"A great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet and a crown of twelve stars on her head.She was pregnant and cried out in pain as she was about to give birth." (Revelations 12:1)I see this as a symbolic sign and a playing out of salvation history that John saw in this vision, without a clear reference to chronological events. I agree with Noose and RickyZ that the tribulation started when Jesus ascended, and the events of Revelation will just be more intensified.
I also see Revelation 12 as a symbolic sign which is clearly referring to Mary the mother of Jesus and to the attempts of the devil through the Roman king Herod to stop the King of the Jews who had just been born. But an angel appeared to Joseph in a dream and warned Him to take Mary and Jesus to the wilderness in Egypt.
"The dragon stood in front of the woman who was about to give birth, so that it might devour her child the moment he was born.She gave birth to a son, a male child, who “will rule all the nations with an iron scepter.”And her child was snatched up to God and to his throne.The woman fled into the wilderness to a place prepared for her by God, where she might be taken care of for 1,260 days." (Revelation 12 4:7; NIV).
Obviously, the demonic hoard failed to stop the birth of Christ or to put Jesus to death, and Mary Joseph and Jesus fled safely to Egypt.
I see a symbolic confirmation of these events in 1986 in America--the Shuttle Challenger with a teacher on board having a female-form of the name of Jesus-- "Christa," who symbolically represented Christ and Mary, both of whom the demons viciously pursued with intense hatred, since they represented their defeat. The serpent tried to destroy the woman who represented the power of Christ, symbolically, by destroying the vessel, but the serpent himself was cast down, which is also what happened when the demons tried to destroy the power of Christ on the Cross. They were defeated by the same Jesus and the same Cross by their own hands in trying to destroy the vessel of humanity represented by the Divine incarnation of the birth of Christ. The lady in this case represents Christ who was killed by the Jews and Romans, but who rose from the dead. **Note: these pictures are copyrighted and belong to the owners indicated)
Symbolic of this in 1986 is the Voyager Aircraft that followed the Shuttle event where a woman--the co-pilot of the plane--
"was given two great wings of an eagle" (Rev. 12:14; NIV)
"The woman was given the two wings of a great eagle, so that she might fly to the place prepared for her in the wilderness, where she would be taken care of for a time, times and half a time, out of the serpent’s reach." (Revelation 12:14; NIV).
As far as this next Revelation prophecy is concerned, I can testify personally that as a messenger of God, like all Christians,
"who keep God's commands and hold fast their testimony about Jesus," (Children of God--sons and daughters) I was pursued by that "enraged dragon," probably like a lot of people at that time, through intense spiritual warfare where this son ended up in depression recovery and long-term (many years) of rehab. I would call that tribulation--
"Then the dragon was enraged at the woman and went off to wage war against the rest of her offspring—those who keep God’s commands and hold fast their testimony about Jesus." (Revelation 12:17; NIV)
"And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death." (Revelation 12:11; NIV)
("word of their testimony" is what we do with our lives)
If you notice, Revelation 12:11 is before the battles described after that--
We go into a battle that is already won--
If we rely on God's power and salvation, going "full-speed ahead..."